Oh, hmm. That's interesting. I'm honestly not sure how I feel about that from a tagging standpoint. On one hand we have technical accuracy and probably good reason for it.
On the other hand, the purpose for the tag is super not obvious to an outsider. Also etymology is funny in that it gets lost over time. That is, the were- prefix to most people is more like a transformation tag than anything. The were- itself doesn't really mean much outside of that.
Anyways. I'll have to poke at that tomorrow and see how consistent the two have been kept, maybe do some cleanup.